herwig



March 15, 1932. c. HERVVIG, JR 1,849,623

AIR REGULATOR Filed April 12, 1930 2 SheetsSheet 1 J16. :FJ G.

11V VEN T OR A TTORNE YS March 15, 1932. 1,849,623

C. HERWI'G. JR

AIR REGULATOR 2 Sheets-Sheet 2.

Filed April 12, 1930 Flq.5.

%NVENTOR A TTORNE Y6 chamber.

Patented Mar. 15, I932 UNITED sT r-Es PATENT OFFICE .CONRAD HERWIG, JR., OF IPIQUA, OHIO, ASSIGNOR TO THE FAVORITE STOVE AND RANGE COMPANY, OF PIQUA, OHIO, A CORPORATION OF OHIO AIR REGULATOR Application filed April 12,

This invention relates to improvements in devices for regulating the admission of air to gas burners used in connection with cooking ranges and other cooking and heating stoves in which burners are used.

It has for its object to provide means for regulating the amount of air admitted to the mixing chamber so that not only the amount of gas may be regulated but the amount of air may be likewise regulated.

For this purpose there is provided ad acent one end of the mixing chamber a plurality of discs, one movable in relation to the other. These discs are concave and placed one 16 against the other so that the edges of the concave faces of the discs contact with each other, leaving the central parts of the discs free from contact. These discs are provided with openings therein adapted to register 20 with each other for the admission of air. The movable disc is adapted to be rotated so that the openings may be more or less closed to restrict the air admitted into the mixing By having the discs contact with each other on their edges a small amount of friction is produced so that they may be easily rotated one with regard to the other, yet the friction being sufficient to hold them in place after they have been adjusted;

The relative position of the discs may be varied to suit the convenience. a In one form the movable disc is placed within the fixed disc, the fixedjdisc' constituting a cap fitting.

over one part of the mixing chamber for the purpose of holding the two discs in position on the mixing chamber. In another form of the apparatus the movable disc is located without the fixed disc and held thereto by means of a bushing having a projection thereon to hold the central parts of the discs in spaced relation to each other, While their outer edges contact.

These and further features of construction will be obvious from the following description taken in connection with the drawings.

Referring to the drawings: Figure 1 is a top plan view of a burner showing the burner head and the stem forming the mixing chamber.

1930. Serial No. 443,644.

Figure 4:.

Figure 6 is a view similar to Figure 3 but showing a diflerent form of attachment for the discs. 7

Figure 7 is a view similar to Figure 6 but showing four openings in each disc instead of two, and showing the openings in register with each other.

Figure 8 is a view similar to Figure 7 but with the openings closed.

Figure 9 is a section on the line 9-9 of Figure 6.

Figure 10 is a section similar to Figure but showing the parts not com'pletely assembled, and showing the concavity of the discs exaggerated. I I

In Figure 1 there is shown a top plan view of a burner, the head of which is indicated by the numeral 1 and has the usual sprangled shape with holes therein for the exit of a mixture of gas and air. The gas and air are conducted to the burner head by means of a mixing chamber and passageway in a stem 2. The end of the stem remote from the burner head is 'flared, as indicated by the numeral 3, and forms a bell-shapedentrance to the mixing chamber within thestem. The outer edges of the flared end 3 form an annular wallt which has smooth surfaces for the purpose of providing seats for the discs that constitute the air regulator.

In the form shown in Figures 1 and 2 there is placed over the flared end a cup-shaped member having a disc 5 and a flange 6. The flange is circular in shape and fits over the outerend of the flared end 3. Extending from the flange there is a plurality of prongs 7 which are bent inwardly to engage over the flared part of the end to hold the cap in seat. In order that the prongs may not be come loose there may be a screw 7 a passing through each prong and screwed into the end of the stem. When this cap is placed in position, as shown particularly in Figure 3, there is a slight space between it and the annular wall 4, and in this space is located a second disc 11. The disc 5 has in the center thereof a hole 8 which serves for the admission of gas into the mixing chamber. Around the hole and between it and the outer periphery of the disc are one or more air openings 9 for the admission of air into the mixing chamber.

Adjacent the outer periphery and where the disc 5 meets the fiangefi there is provided a slot 10. The disc 11 has a hole 12 in the center thereof corresponding to the hole 8 in the center of the disc 5. These holes are for the purpose of admission of gas. The disc 11 also has therein, between the hole 12 and the outer periphery thereof, one or more openings 13 for the admission of air. These openings are adapted to align or register with the air openings 9 in the disc 5 when the disc 11 is in one position, and when it is in another position these openings are closed.

Extending from the outer periphery of the disc 11 is a tongue 14 bent at right angles thereto and extending through the slot 10. This tongue serves the purpose of limiting the movement of the disc 11 with relation to the disc 5, and also serves as a means to be gripped by the hand of the operator for the purpose of rotating the disc 11. The discs 5 and 11 may be further fastened to the stem by means of a screw 4a passing through a hole 5a in disc 5, through a slot 11a in disc '11 and screwed into a boss 2a on the inside of the bell-shaped end of the stem 2. There may be one or more of these screws.

The parts of the discs 5 and 11 adjacent the holes 8 and 12 are slightly spaced apart from each other, while the outer peripheries of these discs contact with each other. This is due to the fact that each disc is slightly concave with their concave faces opposed to each other so that when the discs are placed in position as shown in Figure 2, the outer edges contact leaving a space between the discs adjacent the central holes therein. In placing the parts in position shown in Figure 2 the outer disc in connection with the cap, of which it is a part, so grips the end of the stem that the inner disc is held in frictional engagement between the outer edges of the disc and the annular wall 4 of the stem. The friction is .suiiicient that the inner disc 13 will not easily turn but may be turned by means of the tongue 14 and adjusted so that the openings in the two discs will be properly positioned with relation to each other, and retained in that position until disc 11 is shifted by means of the tongue 14.

The space between these two discs is indicated by the numeral 15.

In Figures 6 to 10 there is shown another form of apparatus. In this form the usual cap member is shown, but instead of the movable disc being within the cap it is on the outside, and for the purpose of providing a seat for this disc the disc part of the cap is pressed in to form a depression 16. In this form the concavity of the disc 5 is on the outside of the cap rather than the inside, as is the case in the other form. In this form the central hole in the movable disc 11 is somewhat larger than that in the disc of the cap.

Ext-ending into this movable disc is a'bushing 17 which has on the outer end thereof a flange 18-closely engaging theouter surface of the disc 11 adjacent thecentral opening therein. The inner part of the bushing is reduced at19 an d forms a shoulder 20, slightly spaced from the inside of the disc 11 when the parts are partly assembled, as shown in Figure 10. When the reduced part of the bushing is forced through the hole in the disc 5 with the shoulder 20 engaging the surface of the disc, the end of the reduced part of the bushing is swedged at 21 so that it holds the disc 5 against the shoulder 20. This relation of the parts is shown in Figure 9, and when the parts are thus fastened together there is a slight space bet-ween the discs 11 and 5 around the holes in the center thereof. This space is due to the bushing extending beyond the opening in the disc 11 that the central parts of these discs are held apart. due to the shoulder on the bushing. The space between these two discs at and around the bushing is about .002 of an inch.

In the unassemhled position as shown in Figure 10 the parts are further apart than .002 of an inch so that as they are brought together the edges are made to fit in close engagement with each other so that one will not slip upon the other without some force being applied thereto. These discs in Figure 10 are shown to be further apart than they normally are in this unassembled position. The relative concavity of the two discs is exaggerated for the purpose of clearly showing the structure of the two discs and how the parts are assembled.

As shown in Figure 6, there are two openings for air in each disc 5 and 11, while in the form shown in Figures 7 and 8 there are four air openings in each. disc. These openings may be varied to suit the convenience an d needs. In operation the rotatable disc is rotated so that the openings are in register with each other, or one disc partly closes the openings in the other disc so that the passageway for the air is restricted. The openings may be entirely open, as shown in Figures 6 and 7., or they may be entirely closed, as shown in Figure 4. The positions of the discs may be varied between these two extremes so that the amount of air admitted may vary from-the full open position to a slightly open position of the ,discs. w a

In the form shown in Figures 1, 2, 3, 4 and 5 the rotatable disc is held by means of the cup-shaped fixed diisc', while in the 1 other forms shown in Figures 6 to 10 the rotatable disc is held inplace by means of the bushing, and the central part held in spaced relation thereto by means of the shoulder on the bushing so that in each form the discs contact only at their outerperipheriesf 2 I desire to comprehend within my invention such modifications as may be clearly einbraced within my claims and the scope of my invention. 1

Having thus fully described my invention, what Iclaim is new and desire to secure by Letters Patent, is: z v

1. In an air regulator, in combination with a burner stem having an opening therein, a closure for said opening consisting of a pair of slightly concaved discs arranged so that the edges of the concaved faces contact, each disc having an air opening therein adapted to register with an opening in the other disc and adapted to be closed by the other disc.

2. In an air regulator, in combination with a stem having an opening therein, a closure for said opening consisting of a cap fitting over said opening, and a rotatable concave disc between said cap and the stem with the edges of the concave surface of said disc engaging the cap, the cap and the disc each having an air opening therein adapted to register with each other and to be closed by the rotation of the disc.

3. In an air regulator, a cap member consisting of a concave disc and a peripheral flange, and a rotatable disc fitting within said cap member and contacting with only the outer edges of the concave face of said concave disc, each disc having an air opening adapted in one position to register with the opening in the other, and in another position to be closed by the other disc.

4. In an air regulator, a cap member consisting of a concave disc having a slot therein and a peripheral flange, and a rotatable disc fitting within said cap and contacting with only the outer edges of the concave face of said concave disc, each disc having an air opening adapted in one position to register with the opening in the other, and in another position to be closed by the other disc, said rotatable disc having a tongue extending through said slot.

5. In an air regulator, a cap member consisting of a disc having a peripheral flange and a slot adjacent saidflange, and a rotat able concave disc fitting within said cap and having a tongue projecting through said slot for rotating the rotatable disc, each disc having a central gas hole and an air opening between the gas hole and its periphery.

-6. 'In an air regulator, in combination with a hollow stem having a flared end, a cap fitting over said flared end, said can consisting of a disc having a peripheral flange with prongs thereon engaging the flaredend of said stem, and a rotatable concave disc between said cap and said" flared end having its concave face adjacent the cap with its edges clamped between the cap and the end of the stem, each of said discs having an open ing for the passage of air and an opening for, the passage of gas.

7 In an air regulator,-in combination with a hollow stem, a cap adapted 'to fit over the end of said stem, said cap consisting of a disc having a peripheral flange engaging the end of said stem, a rotatable concave disc between said cap and said end having its concave face adjacent-the cap with its edges clamped between thecap and the stem, each of said discs having a central gas opening. and an air opening between the gas opening and its periphery, and means to rotate said rotatable disc to vary therelative positions of said air openings.

8. In an air regulator, a pair of concave discs arranged with their concaved facesopposin each other and the edges contacting, each c isc having a central opening and an air opening between the central openingand the periphery, and a bushing in said central openings holding said .discs together with the edges in contact and the central parts in spaced relation to each other.

9. In an air regulator, a pair of discs placed one upon the other with their edges contacting and the central-parts spaced one from the other, each disc having a central opening and an airopening between the central opening and the periphery, and a bushing in said central openings adapted to hold the edges of said discs together and the central parts in spaced relation, one ofsaid discs being adapted to rotate on said bushing.

10. In an air regulator, apair of concave discs arranged with their concave faces opposing each other andtheiredges contacting,each disc having a central opening, one larger than the other, and an air opening betweenthe central opening and the periphery, a bushing having a larger part slightly longer than the thickness of one of said discs fitting in the larger central opening and a smaller. part forming with the larger part a shoulder fitting in the smaller opening, the bushing hav-' ing means on one end to hold one disc against the shoulder'and means on the other end-to hold the other disc on the larger part of the bushing but slightly spacedfrom the shoulder, and means to rotate the discs one upon the other. r

ll. In an air regulator, in combination with a stemhaving an opening therein and forming a mixing chamber, a cap adapted to fit over said opening, said cap consisting ofan inwardly concaved disc and a peripheral flange, said disc having a central opening-and airopenings between the central opening and the periphery, a rotatable disc-contacting at its edges with the edges of the-cap disc and having a central opening larger than the first central opening and air openings adapted to register with the first air openings, and a bushing secured to the cap disc in the central opening therein and passing through the central opening in the other disc to hold its edges in contact with the edges of the other disc with the central parts of the disc in spaced relation to each other.

12. In an air regulator, in combination with a burner stem having an opening therein, a closure for said opening consisting of a pair of slightly concaved discs arranged so that the edges of the concaved faces contact, each disc having an air opening adapted to register with a similar opening in the other disc and'adapted to be closed-by the other disc,

each disc also having a gas opening for the passage of gas into the burner stem.

13. In an air regulator,.a pair of concaved discs placed one upon the other with their edges contacting and the central parts spaced one from the other, each disc having a gas opening and a plurality of air openings and a bushing in said gas openings adapted to hold the discs together with their edges contacting and the central parts in spaced rela- 7 tion, one of said discs being adapted to rotate on said bushing to adjust the air openings.

14. In an air regulator, a pair of discs placed one upon the other with their edges contacting and the central parts spaced one from the other, each disc having a central opening and four other openings spaced around the central opening, and a bushing in said central openings to hold said discs together so that one disc may rotate upon the other with their edges contacting, whereby said four openings in one disc may register with the openings in the other disc or be partly closed or entirely closed by the other disc.

15. In an air regulator, in combination with a burner stem having an opening therein, a closure for said opening consisting of a pair of slightly concaved discs arranged so that the edges of the concaved faces contact, tongues extending from one disc adapted to engage said stem to hold the discs over the opening therein, and means to hold said discs together but permit the rotation of one disc upon the other, each disc having a plurality of openings therein adapted to register with similar openings in the other disc or be closed by the other disc.

16. In an air regulator, in combination with a burner stem having an opening therein, a closure for said opening consisting of a 5 pair of slightly concaved discs arranged so that the edges of the concaved faces contact, tongues extending from one disc adapted to engage said stem to hold the disc over the opening in the stem, each disc having a gas opening and a plurality of air openings adapted to register with similar openingsin the other disc, and means in said gas opening to hold the discs together so that one disc may rotate on the other to control the passage of air through said air openings.

17. In an air regulator, in combination with a hollow stem, a cap member consisting of a disc having a peripheral flange, prongs on the flange and a slot adjacent said flange, a rotatable concave disc in said cap with its concave face adjacent the first-named disc, screws engaging the prongs and the stem to hold the discs clamped on the stem, each of said discs having an opening for the passage of air and an opening for the passage of gas, and a tongue on the last-named disc extending through said slot for rotating the lastnamed disc.

In testimony whereof, I aflix my signature.

CONRAD rnsawro, JR. 

